Re: Rod wt. and line wt. question
You have received some sound advice there. But if I may chime in.
I am assuming you are going stillwater fishing? If not, disregard everything I say......
I personally would use the heavier line. When stillwater fishing you are so much closer to the waters surface that it can be problematic carrying too much line in the air. For this reason, I like to overline and therefore flex the rod quicker which helps to shoot line further for me. It is the shooting line where I get the longer reach instead of trying to carry 70 feet of line two feet above the waters surface. Just get about 30 feet out and then let her fly.
All Means All